In this latest video from RA-Tech, they show their latest upgrade parts such as the M40 woodstock for the VSR-10 airsoft sniper rifle, then followed by a Glock Steel Slide that weighs heavier than the original steel slide at 704g. Also, they have the part no. 27 for the WE SCAR Gas Blowback rifle and the outer barrel extension that would allow you to use a 360mm inner barrel rather than 250mm.